path: root/tools/testing/selftests/cgroup/test_cpuset_prs.sh

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Test for cpuset v2 partition root state (PRS)
#
# The sched verbose flag is set, if available, so that the console log
# can be examined for the correct setting of scheduling domain.
#

skip_test() {
	echo "$1"
	echo "Test SKIPPED"
	exit 0
}

[[ $(id -u) -eq 0 ]] || skip_test "Test must be run as root!"

# Set sched verbose flag, if available
[[ -d /sys/kernel/debug/sched ]] && echo Y > /sys/kernel/debug/sched/verbose

# Get wait_inotify location
WAIT_INOTIFY=$(cd $(dirname $0); pwd)/wait_inotify

# Find cgroup v2 mount point
CGROUP2=$(mount -t cgroup2 | head -1 | awk -e '{print $3}')
[[ -n "$CGROUP2" ]] || skip_test "Cgroup v2 mount point not found!"

CPUS=$(lscpu | grep "^CPU(s)" | sed -e "s/.*:[[:space:]]*//")
[[ $CPUS -lt 8 ]] && skip_test "Test needs at least 8 cpus available!"

# Set verbose flag and delay factor
PROG=$1
VERBOSE=
DELAY_FACTOR=1
while [[ "$1" = -* ]]
do
	case "$1" in
		-v) VERBOSE=1
		    break
		    ;;
		-d) DELAY_FACTOR=$2
		    shift
		    break
		    ;;
		*)  echo "Usage: $PROG [-v] [-d <delay-factor>"
		    exit
		    ;;
	esac
	shift
done

cd $CGROUP2
echo +cpuset > cgroup.subtree_control
[[ -d test ]] || mkdir test
cd test

# Pause in ms
pause()
{
	DELAY=$1
	LOOP=0
	while [[ $LOOP -lt $DELAY_FACTOR ]]
	do
		sleep $DELAY
		((LOOP++))
	done
	return 0
}

console_msg()
{
	MSG=$1
	echo "$MSG"
	echo "" > /dev/console
	echo "$MSG" > /dev/console
	pause 0.01
}

test_partition()
{
	EXPECTED_VAL=$1
	echo $EXPECTED_VAL > cpuset.cpus.partition
	[[ $? -eq 0 ]] || exit 1
	ACTUAL_VAL=$(cat cpuset.cpus.partition)
	[[ $ACTUAL_VAL != $EXPECTED_VAL ]] && {
		echo "cpuset.cpus.partition: expect $EXPECTED_VAL, found $EXPECTED_VAL"
		echo "Test FAILED"
		exit 1
	}
}

test_effective_cpus()
{
	EXPECTED_VAL=$1
	ACTUAL_VAL=$(cat cpuset.cpus.effective)
	[[ "$ACTUAL_VAL" != "$EXPECTED_VAL" ]] && {
		echo "cpuset.cpus.effective: expect '$EXPECTED_VAL', found '$EXPECTED_VAL'"
		echo "Test FAILED"
		exit 1
	}
}

# Adding current process to cgroup.procs as a test
test_add_proc()
{
	OUTSTR="$1"
	ERRMSG=$((echo $$ > cgroup.procs) |& cat)
	echo $ERRMSG | grep -q "$OUTSTR"
	[[ $? -ne 0 ]] && {
		echo "cgroup.procs: expect '$OUTSTR', got '$ERRMSG'"
		echo "Test FAILED"
		exit 1
	}
	echo $$ > $CGROUP2/cgroup.procs	# Move out the task
}

#
# Testing the new "isolated" partition root type
#
test_isolated()
{
	echo 2-3 > cpuset.cpus
	TYPE=$(cat cpuset.cpus.partition)
	[[ $TYPE = member ]] || echo member > cpuset.cpus.partition

	console_msg "Change from member to root"
	test_partition root

	console_msg "Change from root to isolated"
	test_partition isolated

	console_msg "Change from isolated to member"
	test_partition member

	console_msg "Change from member to isolated"
	test_partition isolated

	console_msg "Change from isolated to root"
	test_partition root

	console_msg "Change from root to member"
	test_partition member

	#
	# Testing partition root with no cpu
	#
	console_msg "Distribute all cpus to child partition"
	echo +cpuset > cgroup.subtree_control
	test_partition root

	mkdir A1
	cd A1
	echo 2-3 > cpuset.cpus
	test_partition root
	test_effective_cpus 2-3
	cd ..
	test_effective_cpus ""

	console_msg "Moving task to partition test"
	test_add_proc "No space left"
	cd A1
	test_add_proc ""
	cd ..

	console_msg "Shrink and expand child partition"
	cd A1
	echo 2 > cpuset.cpus
	cd ..
	test_effective_cpus 3
	cd A1
	echo 2-3 > cpuset.cpus
	cd ..
	test_effective_cpus ""

	# Cleaning up
	console_msg "Cleaning up"
	echo $$ > $CGROUP2/cgroup.procs
	[[ -d A1 ]] && rmdir A1
}

#
# Cpuset controller state transition test matrix.
#
# Cgroup test hierarchy
#
# test -- A1 -- A2 -- A3
#      \- B1
#
#  P<v> = set cpus.partition (0:member, 1:root, 2:isolated, -1:root invalid)
#  C<l> = add cpu-list
#  S<p> = use prefix in subtree_control
#  T    = put a task into cgroup
#  O<c>-<v> = Write <v> to CPU online file of <c>
#
SETUP_A123_PARTITIONS="C1-3:P1:S+ C2-3:P1:S+ C3:P1"
TEST_MATRIX=(
	# test  old-A1 old-A2 old-A3 old-B1 new-A1 new-A2 new-A3 new-B1 fail ECPUs Pstate
	# ----  ------ ------ ------ ------ ------ ------ ------ ------ ---- ----- ------
	"  S+    C0-1     .      .    C2-3    S+    C4-5     .      .     0 A2:0-1"
	"  S+    C0-1     .      .    C2-3    P1      .      .      .     0 "
	"  S+    C0-1     .      .    C2-3   P1:S+ C0-1:P1   .      .     0 "
	"  S+    C0-1     .      .    C2-3   P1:S+  C1:P1    .      .     0 "
	"  S+   C0-1:S+   .      .    C2-3     .      .      .     P1     0 "
	"  S+   C0-1:P1   .      .    C2-3    S+     C1      .      .     0 "
	"  S+   C0-1:P1   .      .    C2-3    S+    C1:P1    .      .     0 "
	"  S+   C0-1:P1   .      .    C2-3    S+    C1:P1    .     P1     0 "
	"  S+   C0-1:P1   .      .    C2-3   C4-5     .      .      .     0 A1:4-5"
	"  S+   C0-1:P1   .      .    C2-3  S+:C4-5   .      .      .     0 A1:4-5"
	"  S+    C0-1     .      .   C2-3:P1   .      .      .     C2     0 "
	"  S+    C0-1     .      .   C2-3:P1   .      .      .    C4-5    0 B1:4-5"
	"  S+ C0-3:P1:S+ C2-3:P1 .      .      .      .      .      .     0 A1:0-1,A2:2-3"
	"  S+ C0-3:P1:S+ C2-3:P1 .      .     C1-3    .      .      .     0 A1:1,A2:2-3"
	"  S+ C2-3:P1:S+  C3:P1  .      .     C3      .      .      .     0 A1:,A2:3 A1:P1,A2:P1"
	"  S+ C2-3:P1:S+  C3:P1  .      .     C3      P0     .      .     0 A1:3,A2:3 A1:P1,A2:P0"
	"  S+ C2-3:P1:S+  C2:P1  .      .     C2-4    .      .      .     0 A1:3-4,A2:2"
	"  S+ C2-3:P1:S+  C3:P1  .      .     C3      .      .     C0-2   0 A1:,B1:0-2 A1:P1,A2:P1"
	"  S+ $SETUP_A123_PARTITIONS    .     C2-3    .      .      .     0 A1:,A2:2,A3:3 A1:P1,A2:P1,A3:P1"

	# CPU offlining cases:
	"  S+    C0-1     .      .    C2-3    S+    C4-5     .     O2-0   0 A1:0-1,B1:3"
	"  S+ C0-3:P1:S+ C2-3:P1 .      .     O2-0    .      .      .     0 A1:0-1,A2:3"
	"  S+ C0-3:P1:S+ C2-3:P1 .      .     O2-0   O2-1    .      .     0 A1:0-1,A2:2-3"
	"  S+ C0-3:P1:S+ C2-3:P1 .      .     O1-0    .      .      .     0 A1:0,A2:2-3"
	"  S+ C0-3:P1:S+ C2-3:P1 .      .     O1-0   O1-1    .      .     0 A1:0-1,A2:2-3"
	"  S+ C2-3:P1:S+  C3:P1  .      .     O3-0   O3-1    .      .     0 A1:2,A2:3 A1:P1,A2:P1"
	"  S+ C2-3:P1:S+  C3:P2  .      .     O3-0   O3-1    .      .     0 A1:2,A2:3 A1:P1,A2:P2"
	"  S+ C2-3:P1:S+  C3:P1  .      .     O2-0   O2-1    .      .     0 A1:2,A2:3 A1:P1,A2:P1"
	"  S+ C2-3:P1:S+  C3:P2  .      .     O2-0   O2-1    .      .     0 A1:2,A2:3 A1:P1,A2:P2"
	"  S+ C2-3:P1:S+  C3:P1  .      .     O2-0    .      .      .     0 A1:,A2:3 A1:P1,A2:P1"
	"  S+ C2-3:P1:S+  C3:P1  .      .     O3-0    .      .      .     0 A1:2,A2: A1:P1,A2:P1"
	"  S+ C2-3:P1:S+  C3:P1  .      .    T:O2-0   .      .      .     0 A1:3,A2:3 A1:P1,A2:P-1"
	"  S+ C2-3:P1:S+  C3:P1  .      .      .    T:O3-0   .      .     0 A1:2,A2:2 A1:P1,A2:P-1"
	"  S+ $SETUP_A123_PARTITIONS    .     O1-0    .      .      .     0 A1:,A2:2,A3:3 A1:P1,A2:P1,A3:P1"
	"  S+ $SETUP_A123_PARTITIONS    .     O2-0    .      .      .     0 A1:1,A2:,A3:3 A1:P1,A2:P1,A3:P1"
	"  S+ $SETUP_A123_PARTITIONS    .     O3-0    .      .      .     0 A1:1,A2:2,A3: A1:P1,A2:P1,A3:P1"
	"  S+ $SETUP_A123_PARTITIONS    .    T:O1-0   .      .      .     0 A1:2-3,A2:2-3,A3:3 A1:P1,A2:P-1,A3:P-1"
	"  S+ $SETUP_A123_PARTITIONS    .      .    T:O2-0   .      .     0 A1:1,A2:3,A3:3 A1:P1,A2:P1,A3:P-1"
	"  S+ $SETUP_A123_PARTITIONS    .      .      .    T:O3-0   .     0 A1:1,A2:2,A3:2 A1:P1,A2:P1,A3:P-1"
	"  S+ $SETUP_A123_PARTITIONS    .    T:O1-0  O1-1    .      .     0 A1:1,A2:2,A3:3 A1:P1,A2:P1,A3:P1"
	"  S+ $SETUP_A123_PARTITIONS    .      .    T:O2-0  O2-1    .     0 A1:1,A2:2,A3:3 A1:P1,A2:P1,A3:P1"
	"  S+ $SETUP_A123_PARTITIONS    .      .      .    T:O3-0  O3-1   0 A1:1,A2:2,A3:3 A1:P1,A2:P1,A3:P1"
	"  S+ $SETUP_A123_PARTITIONS    .    T:O1-0  O2-0   O1-1    .     0 A1:1,A2:,A3:3 A1:P1,A2:P1,A3:P1"
	"  S+ $SETUP_A123_PARTITIONS    .    T:O1-0  O2-0   O2-1    .     0 A1:2-3,A2:2-3,A3:3 A1:P1,A2:P-1,A3:P-1"

	# test  old-A1 old-A2 old-A3 old-B1 new-A1 new-A2 new-A3 new-B1 fail ECPUs Pstate
	# ----  ------ ------ ------ ------ ------ ------ ------ ------ ---- ----- ------
	#
	# Incorrect change to cpuset.cpus invalidates partition root
	#
	# Adding CPUs to partition root that are not in parent's
	# cpuset.cpus is allowed, but those extra CPUs are ignored.
	"  S+ C2-3:P1:S+ C3:P1   .      .      .     C2-4    .      .     0 A1:,A2:2-3 A1:P1,A2:P1"

	# Taking away all CPUs from parent or itself if there are tasks
	# will make the partition invalid.
	"  S+ C2-3:P1:S+  C3:P1  .      .      T     C2-3    .      .     0 A1:2-3,A2:2-3 A1:P1,A2:P-1"
	"  S+  C3:P1:S+    C3    .      .      T      P1     .      .     0 A1:3,A2:3 A1:P1,A2:P-1"
	"  S+ $SETUP_A123_PARTITIONS    .    T:C2-3   .      .      .     0 A1:2-3,A2:2-3,A3:3 A1:P1,A2:P-1,A3:P-1"
	"  S+ $SETUP_A123_PARTITIONS    . T:C2-3:C1-3 .      .      .     0 A1:1,A2:2,A3:3 A1:P1,A2:P1,A3:P1"

	# Changing a partition root to member makes child partitions invalid
	"  S+ C2-3:P1:S+  C3:P1  .      .      P0     .      .      .     0 A1:2-3,A2:3 A1:P0,A2:P-1"
	"  S+ $SETUP_A123_PARTITIONS    .     C2-3    P0     .      .     0 A1:2-3,A2:2-3,A3:3 A1:P1,A2:P0,A3:P-1"

	# cpuset.cpus can contains cpus not in parent's cpuset.cpus as long
	# as they overlap.
	"  S+ C2-3:P1:S+  .      .      .      .   C3-4:P1   .      .     0 A1:2,A2:3 A1:P1,A2:P1"

	# Deletion of CPUs distributed to child cgroup is allowed.
	"  S+ C0-1:P1:S+ C1      .    C2-3   C4-5     .      .      .     0 A1:4-5,A2:4-5"

	# To become a valid partition root, cpuset.cpus must overlap parent's
	# cpuset.cpus.
	"  S+   C0-1:P1   .      .    C2-3    S+   C4-5:P1   .      .     0 A1:0-1,A2:0-1 A1:P1,A2:P-1"

	# Enabling partition with child cpusets is allowed
	"  S+   C0-1:S+  C1      .    C2-3    P1      .      .      .     0 A1:0-1,A2:1 A1:P1"

	# A partition root with non-partition root parent is invalid, but it
	# can be made valid if its parent becomes a partition root too.
	"  S+   C0-1:S+  C1      .    C2-3     .      P2     .      .     0 A1:0-1,A2:1 A1:P0,A2:P-2"
	"  S+   C0-1:S+ C1:P2    .    C2-3     P1     .      .      .     0 A1:0,A2:1 A1:P1,A2:P2"

	# A non-exclusive cpuset.cpus change will invalidate partition and its siblings
	"  S+   C0-1:P1   .      .    C2-3   C0-2     .      .      .     0 A1:0-2,B1:2-3 A1:P-1,B1:P0"
	"  S+   C0-1:P1   .      .  P1:C2-3  C0-2   .      .      .     0 A1:0-2,B1:2-3 A1:P-1,B1:P-1"
	"  S+    C0-1     .      .  P1:C2-3  C0-2   .      .      .     0 A1:0-2,B1:2-3 A1:P0,B1:P-1"

	# test  old-A1 old-A2 old-A3 old-B1 new-A1 new-A2 new-A3 new-B1 fail ECPUs Pstate
	# ----  ------ ------ ------ ------ ------ ------ ------ ------ ---- ----- ------
	# Failure cases:

	# A task cannot be added to a partition with no cpu
	"  S+ C2-3:P1:S+  C3:P1  .      .    O2-0:T   .      .      .     1 A1:,A2:3 A1:P1,A2:P1"
)

#
# Write to the cpu online file
#  $1 - <c>-<v> where <c> = cpu number, <v> value to be written
#
write_cpu_online()
{
	CPU=${1%-*}
	VAL=${1#*-}
	CPUFILE=//sys/devices/system/cpu/cpu${CPU}/online
	if [[ $VAL -eq 0 ]]
	then
		OFFLINE_CPUS="$OFFLINE_CPUS $CPU"
	else
		[[ -n "$OFFLINE_CPUS" ]] && {
			OFFLINE_CPUS=$(echo $CPU $CPU $OFFLINE_CPUS | fmt -1 |\
					sort | uniq -u)
		}
	fi
	echo $VAL > $CPUFILE
	pause 0.01
}

#
# Set controller state
#  $1 - cgroup directory
#  $2 - state
#  $3 - showerr
#
# The presence of ":" in state means transition from one to the next.
#
set_ctrl_state()
{
	TMPMSG=/tmp/.msg_$$
	CGRP=$1
	STATE=$2
	SHOWERR=${3}${VERBOSE}
	CTRL=${CTRL:=$CONTROLLER}
	HASERR=0
	REDIRECT="2> $TMPMSG"
	[[ -z "$STATE" || "$STATE" = '.' ]] && return 0

	rm -f $TMPMSG
	for CMD in $(echo $STATE | sed -e "s/:/ /g")
	do
		TFILE=$CGRP/cgroup.procs
		SFILE=$CGRP/cgroup.subtree_control
		PFILE=$CGRP/cpuset.cpus.partition
		CFILE=$CGRP/cpuset.cpus
		S=$(expr substr $CMD 1 1)
		if [[ $S = S ]]
		then
			PREFIX=${CMD#?}
			COMM="echo ${PREFIX}${CTRL} > $SFILE"
			eval $COMM $REDIRECT
		elif [[ $S = C ]]
		then
			CPUS=${CMD#?}
			COMM="echo $CPUS > $CFILE"
			eval $COMM $REDIRECT
		elif [[ $S = P ]]
		then
			VAL=${CMD#?}
			case $VAL in
			0)  VAL=member
			    ;;
			1)  VAL=root
			    ;;
			2)  VAL=isolated
			    ;;
			*)
			    echo "Invalid partition state - $VAL"
			    exit 1
			    ;;
			esac
			COMM="echo $VAL > $PFILE"
			eval $COMM $REDIRECT
		elif [[ $S = O ]]
		then
			VAL=${CMD#?}
			write_cpu_online $VAL
		elif [[ $S = T ]]
		then
			COMM="echo 0 > $TFILE"
			eval $COMM $REDIRECT
		fi
		RET=$?
		[[ $RET -ne 0 ]] && {
			[[ -n "$SHOWERR" ]] && {
				echo "$COMM"
				cat $TMPMSG
			}
			HASERR=1
		}
		pause 0.01
		rm -f $TMPMSG
	done
	return $HASERR
}

set_ctrl_state_noerr()
{
	CGRP=$1
	STATE=$2
	[[ -d $CGRP ]] || mkdir $CGRP
	set_ctrl_state $CGRP $STATE 1
	[[ $? -ne 0 ]] && {
		echo "ERROR: Failed to set $2 to cgroup $1!"
		exit 1
	}
}

online_cpus()
{
	[[ -n "OFFLINE_CPUS" ]] && {
		for C in $OFFLINE_CPUS
		do
			write_cpu_online ${C}-1
		done
	}
}

#
# Return 1 if the list of effective cpus isn't the same as the initial list.
#
reset_cgroup_states()
{
	echo 0 > $CGROUP2/cgroup.procs
	online_cpus
	rmdir A1/A2/A3 A1/A2 A1 B1 > /dev/null 2>&1
	set_ctrl_state . S-
	pause 0.01
}

dump_states()
{
	for DIR in A1 A1/A2 A1/A2/A3 B1
	do
		ECPUS=$DIR/cpuset.cpus.effective
		PRS=$DIR/cpuset.cpus.partition
		[[ -e $ECPUS ]] && echo "$ECPUS: $(cat $ECPUS)"
		[[ -e $PRS   ]] && echo "$PRS: $(cat $PRS)"
	done
}

#
# Check effective cpus
# $1 - check string, format: <cgroup>:<cpu-list>[,<cgroup>:<cpu-list>]*
#
check_effective_cpus()
{
	CHK_STR=$1
	for CHK in $(echo $CHK_STR | sed -e "s/,/ /g")
	do
		set -- $(echo $CHK | sed -e "s/:/ /g")
		CGRP=$1
		CPUS=$2
		[[ $CGRP = A2 ]] && CGRP=A1/A2
		[[ $CGRP = A3 ]] && CGRP=A1/A2/A3
		FILE=$CGRP/cpuset.cpus.effective
		[[ -e $FILE ]] || return 1
		[[ $CPUS = $(cat $FILE) ]] || return 1
	done
}

#
# Check cgroup states
#  $1 - check string, format: <cgroup>:<state>[,<cgroup>:<state>]*
#
check_cgroup_states()
{
	CHK_STR=$1
	for CHK in $(echo $CHK_STR | sed -e "s/,/ /g")
	do
		set -- $(echo $CHK | sed -e "s/:/ /g")
		CGRP=$1
		STATE=$2
		FILE=
		EVAL=$(expr substr $STATE 2 2)
		[[ $CGRP = A2 ]] && CGRP=A1/A2
		[[ $CGRP = A3 ]] && CGRP=A1/A2/A3

		case $STATE in
			P*) FILE=$CGRP/cpuset.cpus.partition
			    ;;
			*)  echo "Unknown state: $STATE!"
			    exit 1
			    ;;
		esac
		VAL=$(cat $FILE)

		case "$VAL" in
			member) VAL=0
				;;
			root)	VAL=1
				;;
			isolated)
				VAL=2
				;;
			"root invalid"*)
				VAL=-1
				;;
			"isolated invalid"*)
				VAL=-2
				;;
		esac
		[[ $EVAL != $VAL ]] && return 1
	done
	return 0
}

#
# Run cpuset state transition test
#  $1 - test matrix name
#
# This test is somewhat fragile as delays (sleep x) are added in various
# places to make sure state changes are fully propagated before the next
# action. These delays may need to be adjusted if running in a slower machine.
#
run_state_test()
{
	TEST=$1
	CONTROLLER=cpuset
	CPULIST=0-6
	I=0
	eval CNT="\${#$TEST[@]}"

	reset_cgroup_states
	echo $CPULIST > cpuset.cpus
	echo root > cpuset.cpus.partition
	console_msg "Running state transition test ..."

	while [[ $I -lt $CNT ]]
	do
		echo "Running test $I ..." > /dev/console
		eval set -- "\${$TEST[$I]}"
		ROOT=$1
		OLD_A1=$2
		OLD_A2=$3
		OLD_A3=$4
		OLD_B1=$5
		NEW_A1=$6
		NEW_A2=$7
		NEW_A3=$8
		NEW_B1=$9
		RESULT=${10}
		ECPUS=${11}
		STATES=${12}

		set_ctrl_state_noerr .        $ROOT
		set_ctrl_state_noerr A1       $OLD_A1
		set_ctrl_state_noerr A1/A2    $OLD_A2
		set_ctrl_state_noerr A1/A2/A3 $OLD_A3
		set_ctrl_state_noerr B1       $OLD_B1
		RETVAL=0
		set_ctrl_state A1       $NEW_A1; ((RETVAL += $?))
		set_ctrl_state A1/A2    $NEW_A2; ((RETVAL += $?))
		set_ctrl_state A1/A2/A3 $NEW_A3; ((RETVAL += $?))
		set_ctrl_state B1       $NEW_B1; ((RETVAL += $?))

		[[ $RETVAL -ne $RESULT ]] && {
			echo "Test $TEST[$I] failed result check!"
			eval echo \"\${$TEST[$I]}\"
			dump_states
			online_cpus
			exit 1
		}

		[[ -n "$ECPUS" && "$ECPUS" != . ]] && {
			check_effective_cpus $ECPUS
			[[ $? -ne 0 ]] && {
				echo "Test $TEST[$I] failed effective CPU check!"
				eval echo \"\${$TEST[$I]}\"
				echo
				dump_states
				online_cpus
				exit 1
			}
		}

		[[ -n "$STATES" ]] && {
			check_cgroup_states $STATES
			[[ $? -ne 0 ]] && {
				echo "FAILED: Test $TEST[$I] failed states check!"
				eval echo \"\${$TEST[$I]}\"
				echo
				dump_states
				online_cpus
				exit 1
			}
		}

		reset_cgroup_states
		#
		# Check to see if effective cpu list changes
		#
		pause 0.05
		NEWLIST=$(cat cpuset.cpus.effective)
		[[ $NEWLIST != $CPULIST ]] && {
			echo "Effective cpus changed to $NEWLIST after test $I!"
			exit 1
		}
		[[ -n "$VERBOSE" ]] && echo "Test $I done."
		((I++))
	done
	echo "All $I tests of $TEST PASSED."

	echo member > cpuset.cpus.partition
}

#
# Wait for inotify event for the given file and read it
# $1: cgroup file to wait for
# $2: file to store the read result
#
wait_inotify()
{
	CGROUP_FILE=$1
	OUTPUT_FILE=$2

	$WAIT_INOTIFY $CGROUP_FILE
	cat $CGROUP_FILE > $OUTPUT_FILE
}

#
# Test if inotify events are properly generated when going into and out of
# invalid partition state.
#
test_inotify()
{
	ERR=0
	PRS=/tmp/.prs_$$
	[[ -f $WAIT_INOTIFY ]] || {
		echo "wait_inotify not found, inotify test SKIPPED."
		return
	}

	pause 0.01
	echo 1 > cpuset.cpus
	echo 0 > cgroup.procs
	echo root > cpuset.cpus.partition
	pause 0.01
	rm -f $PRS
	wait_inotify $PWD/cpuset.cpus.partition $PRS &
	pause 0.01
	set_ctrl_state . "O1-0"
	pause 0.01
	check_cgroup_states ".:P-1"
	if [[ $? -ne 0 ]]
	then
		echo "FAILED: Inotify test - partition not invalid"
		ERR=1
	elif [[ ! -f $PRS ]]
	then
		echo "FAILED: Inotify test - event not generated"
		ERR=1
		kill %1
	elif [[ $(cat $PRS) != "root invalid"* ]]
	then
		echo "FAILED: Inotify test - incorrect state"
		cat $PRS
		ERR=1
	fi
	online_cpus
	echo member > cpuset.cpus.partition
	echo 0 > ../cgroup.procs
	if [[ $ERR -ne 0 ]]
	then
		exit 1
	else
		echo "Inotify test PASSED"
	fi
}

run_state_test TEST_MATRIX
test_isolated
test_inotify
echo "All tests PASSED."
cd ..
rmdir test